In two years you've gained 20 pounds, a substantial portion of which appears to be LBM. That is excellent, especially considering you "did everything wrong for the first year." You also improved your lifts by really impressive margins. Congrats on what you've achieved.
Now let's crunch the numbers. 3500 cals/d @ a BW of 205 is about 17 cals/lb/d--just about perfect for an adult trying to do a nice slow bulk (unless your job is extremely demanding physically). I doubt very much that any slowdown in strength/LBM gains of late are attributable to undereating. The fact is, you are now exiting the 'noob gains' phase, and are going to find that strength/LBM gains will be significantly harder to achieve henceforth. Patience, grasshopper. (70s pop-culture reference.)
In short, I think you should stay the course diet-wise. If you try and force the issue by increasing cals, I'm afraid you'll find that extra size gains will accrue mainly to your belly/love handle region.